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Finding the Fourth Proportional to 316.32, 474.48 and 270.51

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Solution

The fourth proportional to 316.32, 474.48 and 270.51 is: 405.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.32 : 474.48 = 270.51 : x
  2. Step 2: Convert to fraction form
    316.32/474.48 = 270.51/x
  3. Step 3: Cross multiply
    316.32x = 474.48 × 270.51
  4. Step 4: Simplify right side
    316.32x = 128,351.58
  5. Step 5: Solve for x
    x = 128,351.58/316.32
  6. Step 6: Final answer
    x = 405.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.